... be installed to the lies, such as length counting device, vertical cutting device, and film spreading roller. (d)high output, professional ... to back friction coiling up device.roll specification:φ315X800mm,coiling up speed Vmax=30-60m/min . EXTRUDER: Model SJ-165/30×2 ... .2 Heating power (k w) 200 Heating type resistor COOLING DEVICE Model SF-cast aluminum air-ring Type Twin air –inlets Power ...